AMPH Amphastar Pharmaceuticals, Inc.
Nasdaq · SEC CIK 1297184 · EDGAR
- Bought, last 12 months
- $0 0 purchases by 0 insiders
- Sold, last 12 months
- $1.71M 11 sales by 4 insiders
- Filings on record
- 234 since 2021-07-08, latest 2026-09-23 18:02
BoughtSold
Most active insiders, 12 months
| Insider | Title | Bought | Sold |
|---|---|---|---|
| Petersen Floyd F. | Dir | — | $575.6K |
| Zhou Rong | SENIOR EVP, PRODUCTION CENTER | — | $571.1K |
| PETERS WILLIAM J | CFO, EVP, Treas, Dir | — | $287.4K |
| PRINS RICHARD K | Dir | — | $275.1K |
| Pierce Anthony T | Dir | — | — |
| Gaugh David Russell | Dir | — | — |
| Deflin Gayle | Dir | — | — |
| Liawatidewi Yakob | EVP CORP ADMIN CENTER, Dir | — | — |
| Gerst Diane G. | Dir | — | — |
| Zhang Jack Y. | CEO, CSO, Dir, 10% | — | — |
Transactions 354
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2024-11-13 | 2024-11-12 | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | M - OptEx | $14.95 | +6,893 | 125.3K | +6% | +$103.1K |
| 2024-11-12 | 2024-11-11 | AMPH | Luo Mary Z. | COO, COB, Chief Scientist, Dir, 10% | G - Gift | $0.00 | -125.0K | 2.51M | -5% | $0 | |
| I | 2024-11-12 | 2024-11-11 | AMPH | Luo Mary Z. | COO, COB, Chief Scientist, Dir, 10% | G - Gift | $0.00 | -125.0K | 1.10M | -10% | $0 |
| D | 2024-11-08 | 2024-11-06 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $13.03 | +7,426 | 101.5K | +8% | +$96.8K |
| D | 2024-11-08 | 2024-11-06 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $52.05 | -7,426 | 94.1K | -7% | -$386.5K |
| D | 2024-11-08 | 2024-11-06 | AMPH | Liawatidewi Yakob | EVP CORP ADMIN CENTER, Dir | M - OptEx | $13.03 | +5,214 | 80.2K | +7% | +$67.9K |
| D | 2024-11-08 | 2024-11-06 | AMPH | Liawatidewi Yakob | EVP CORP ADMIN CENTER, Dir | S - Sale+OE | $52.05 | -5,214 | 74.9K | -7% | -$271.4K |
| D | 2024-09-17 | 2024-09-13 | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | M - OptEx | $14.95 | +3,000 | 121.4K | +3% | +$44.9K |
| D | 2024-09-17 | 2024-09-13 | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | S - Sale+OE | $48.26 | -3,000 | 118.4K | -2% | -$144.8K |
| D | 2024-09-16 | 2024-09-13 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | M - OptEx | $14.69 | +100.0K | 2.63M | +4% | +$1.47M |
| 2024-09-06 | 2024-09-05 | AMPH | Petersen Floyd F. | Dir | S - Sale | $46.47 | -3,000 | 75.4K | -4% | -$139.4K | |
| D | 2024-08-27 | 2024-08-26 | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | M - OptEx | $14.95 | +4,000 | 122.4K | +3% | +$59.8K |
| D | 2024-08-27 | 2024-08-26 | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | S - Sale+OE | $48.35 | -4,000 | 118.4K | -3% | -$193.4K |
| DM | 2024-08-13 | 2024-08-12 | AMPH | PRINS RICHARD K | Dir | M - OptEx | $19.83 | +17.1K | 43.9K | +64% | +$339.2K |
| D | 2024-08-13 | 2024-08-12 | AMPH | PRINS RICHARD K | Dir | S - Sale+OE | $43.07 | -17.1K | 34.0K | -33% | -$736.5K |
| D | 2024-08-02 | 2024-07-31 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $44.23 | -10.3K | 94.1K | -10% | -$454.8K |
| D | 2024-08-02 | 2024-07-31 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $20.23 | +10.3K | 104.4K | +11% | +$208.0K |
| M | 2024-06-28 | 2024-06-27 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale | $40.93 | -3,596 | 94.7K | -4% | -$147.2K |
| D | 2024-06-11 | 2024-06-10 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | M - OptEx | $14.69 | +100.0K | 2.53M | +4% | +$1.47M |
| 2024-06-11 | 2024-06-10 | AMPH | Petersen Floyd F. | Dir | S - Sale | $41.40 | -3,000 | 78.4K | -4% | -$124.2K | |
| D | 2024-06-05 | 2024-06-03 | AMPH | Deflin Gayle | Dir | A - Grant | $0.00 | +3,076 | 5,792 | +113% | $0 |
| 2024-06-05 | 2024-06-04 | AMPH | Liawatidewi Yakob | EVP CORP ADMIN CENTER, Dir | F - Tax | $42.22 | -272 | 74.9K | -0.4% | -$11.5K | |
| D | 2024-06-05 | 2024-06-03 | AMPH | Lee Howard | Dir | A - Grant | $0.00 | +3,076 | 148.4K | +2% | $0 |
| D | 2024-06-05 | 2024-06-05 | AMPH | Lee Howard | Dir | F - Tax | $42.04 | -579 | 147.8K | -0.4% | -$24.3K |
| D | 2024-06-05 | 2024-06-03 | AMPH | Petersen Floyd F. | Dir | A - Grant | $0.00 | +3,076 | 81.4K | +4% | $0 |
| D | 2024-06-05 | 2024-06-03 | AMPH | Petersen Floyd F. | Dir | S - Sale | $42.65 | -500 | 78.3K | -0.6% | -$21.3K |
| D | 2024-06-05 | 2024-06-03 | AMPH | Gerst Diane G. | Dir | A - Grant | $0.00 | +3,076 | 18.6K | +20% | $0 |
| D | 2024-06-05 | 2024-06-03 | AMPH | PRINS RICHARD K | Dir | A - Grant | $0.00 | +3,076 | 34.0K | +10% | $0 |
| D | 2024-06-05 | 2024-06-03 | AMPH | ZASLOFF MICHAEL A | Dir | A - Grant | $0.00 | +3,076 | 24.4K | +14% | $0 |
| 2024-05-21 | 2024-05-19 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | F - Tax | $43.48 | -387 | 97.3K | -0.4% | -$16.8K | |
| 2024-05-02 | 2024-05-01 | AMPH | Petersen Floyd F. | Dir | S - Sale | $41.67 | -500 | 78.8K | -0.6% | -$20.8K | |
| 2024-04-02 | 2024-04-01 | AMPH | Petersen Floyd F. | Dir | S - Sale | $43.43 | -500 | 79.3K | -0.6% | -$21.7K | |
| M | 2024-03-19 | 2024-03-15+ | AMPH | Liawatidewi Yakob | EVP CORP ADMIN CENTER, Dir | F - Tax | $43.05 | -4,424 | 78.2K | -5% | -$190.5K |
| M | 2024-03-19 | 2024-03-15+ | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | F - Tax | $43.05 | -11.6K | 107.0K | -10% | -$501.3K |
| M | 2024-03-19 | 2024-03-15+ | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | F - Tax | $43.05 | -5,535 | 120.0K | -4% | -$238.3K |
| D | 2024-03-19 | 2024-03-15 | AMPH | Luo Mary Z. | COO, COB, Chief Scientist, Dir, 10% | M - OptEx | $12.46 | +722.0K | 2.86M | +34% | +$9.00M |
| DMI | 2024-03-19 | 2024-03-15+ | AMPH | Luo Mary Z. | COO, COB, Chief Scientist, Dir, 10% | F - Tax | $43.05 | -209.7K | 1.24M | -14% | -$9.03M |
| DM | 2024-03-19 | 2024-03-15+ | AMPH | Luo Mary Z. | COO, COB, Chief Scientist, Dir, 10% | F - Tax | $43.05 | -424.5K | 2.43M | -15% | -$18.27M |
| DI | 2024-03-19 | 2024-03-15 | AMPH | Luo Mary Z. | COO, COB, Chief Scientist, Dir, 10% | M - OptEx | $12.46 | +310.9K | 1.44M | +28% | +$3.87M |
| I | 2024-03-08 | 2024-03-06 | AMPH | Luo Mary Z. | COO, COB, Chief Scientist, Dir, 10% | F - Tax | $46.31 | -2,990 | 1.13M | -0.3% | -$138.5K |
| 2024-03-08 | 2024-03-06 | AMPH | Luo Mary Z. | COO, COB, Chief Scientist, Dir, 10% | F - Tax | $46.31 | -7,031 | 2.14M | -0.3% | -$325.6K | |
| DM | 2024-03-08 | 2024-03-06 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $46.48 | -18.1K | 111.5K | -14% | -$843.0K |
| D | 2024-03-08 | 2024-03-06 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | F - Tax | $46.31 | -2,190 | 109.3K | -2% | -$101.4K |
| D | 2024-03-08 | 2024-03-06 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $11.33 | +8,826 | 129.6K | +7% | +$100.0K |
| 2024-03-08 | 2024-03-06 | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | F - Tax | $46.31 | -1,390 | 123.6K | -1% | -$64.4K | |
| 2024-03-08 | 2024-03-06 | AMPH | Liawatidewi Yakob | EVP CORP ADMIN CENTER, Dir | F - Tax | $46.31 | -1,221 | 79.2K | -2% | -$56.5K | |
| M | 2024-03-06 | 2024-03-05 | AMPH | ZASLOFF MICHAEL A | Dir | S - Sale | $47.18 | -12.5K | 24.4K | -34% | -$589.7K |
| DI | 2024-03-06 | 2024-03-04 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | A - Grant | $0.00 | +27.1K | 1.13M | +2% | $0 |
| D | 2024-03-06 | 2024-03-04 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | A - Grant | $0.00 | +64.3K | 2.14M | +3% | $0 |
| D | 2024-03-06 | 2024-03-04 | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | A - Grant | $0.00 | +12.5K | 124.9K | +11% | $0 |
| D | 2024-03-06 | 2024-03-04 | AMPH | Liawatidewi Yakob | EVP CORP ADMIN CENTER, Dir | A - Grant | $0.00 | +10.8K | 80.4K | +15% | $0 |
| D | 2024-03-06 | 2024-03-04 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | A - Grant | $0.00 | +19.4K | 120.8K | +19% | $0 |
| M | 2024-03-04 | 2024-03-01 | AMPH | Petersen Floyd F. | Dir | S - Sale | $45.69 | -500 | 79.9K | -0.6% | -$22.8K |
| M | 2024-02-02 | 2024-02-01 | AMPH | Petersen Floyd F. | Dir | S - Sale | $53.10 | -500 | 80.4K | -0.6% | -$26.5K |
| M | 2024-01-11 | 2024-01-10 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | S - Sale | $54.59 | -131.4K | 1.11M | -11% | -$7.17M |
| M | 2024-01-10 | 2024-01-08+ | AMPH | Luo Mary Z. | COO, COB, Chief Scientist, Dir, 10% | S - Sale | $58.23 | -219.8K | 1.24M | -15% | -$12.80M |
| M | 2024-01-03 | 2024-01-02 | AMPH | Petersen Floyd F. | Dir | S - Sale | $61.36 | -500 | 80.8K | -0.6% | -$30.7K |
| DM | 2023-12-05 | 2023-12-01+ | AMPH | Zhou Rong | Senior EVP, Production Center | M - OptEx | $15.20 | +7,830 | 115.9K | +7% | +$119.0K |
| DM | 2023-12-05 | 2023-12-01+ | AMPH | Zhou Rong | Senior EVP, Production Center | S - Sale+OE | $59.03 | -7,830 | 112.4K | -7% | -$462.2K |
| M | 2023-12-04 | 2023-12-01 | AMPH | Petersen Floyd F. | Dir | S - Sale | $57.90 | -500 | 81.7K | -0.6% | -$29.0K |
| 2023-11-20 | 2023-11-17 | AMPH | PRINS RICHARD K | Dir | S - Sale | $55.86 | -4,000 | 31.9K | -11% | -$223.4K | |
| 2023-11-20 | 2023-11-17 | AMPH | PRINS RICHARD K | Dir | G - Gift | $0.00 | -1,000 | 30.9K | -3% | $0 | |
| DM | 2023-11-16 | 2023-11-14 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $55.67 | -59.2K | 116.2K | -34% | -$3.30M |
| DM | 2023-11-16 | 2023-11-14 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $15.61 | +59.2K | 122.6K | +94% | +$925.0K |
| 2023-11-15 | 2023-11-14 | AMPH | Deflin Gayle | Dir | S - Sale | $55.45 | -4,163 | 2,716 | -61% | -$230.8K | |
| 2023-11-15 | 2023-11-13 | AMPH | PRINS RICHARD K | Dir | S - Sale | $52.50 | -5,000 | 35.9K | -12% | -$262.5K | |
| 2023-11-02 | 2023-11-01 | AMPH | Petersen Floyd F. | Dir | S - Sale | $45.30 | -500 | 81.8K | -0.6% | -$22.6K | |
| 2023-10-03 | 2023-10-02 | AMPH | Petersen Floyd F. | Dir | S - Sale | $45.78 | -500 | 82.3K | -0.6% | -$22.9K | |
| DM | 2023-09-08 | 2023-09-06 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $16.93 | +56.5K | 162.1K | +54% | +$956.8K |
| DM | 2023-09-08 | 2023-09-06 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $51.75 | -60.7K | 101.4K | -37% | -$3.14M |
| DM | 2023-08-29 | 2023-08-28 | AMPH | Liawatidewi Yakob | EVP Corp Admin Center, Dir | M - OptEx | $14.86 | +28.8K | 78.5K | +58% | +$428.1K |
| D | 2023-08-29 | 2023-08-28 | AMPH | Liawatidewi Yakob | EVP Corp Admin Center, Dir | S - Sale+OE | $53.13 | -28.8K | 69.7K | -29% | -$1.53M |
| 2023-08-21 | 2023-08-18 | AMPH | PRINS RICHARD K | Dir | S - Sale | $52.50 | -2,000 | 40.9K | -5% | -$105.0K | |
| 2023-08-16 | 2023-08-15 | AMPH | ZASLOFF MICHAEL A | Dir | S - Sale | $57.22 | -12.8K | 33.8K | -27% | -$730.1K | |
| 2023-08-16 | 2023-08-15 | AMPH | PRINS RICHARD K | Dir | S - Sale | $57.39 | -4,163 | 42.9K | -9% | -$238.9K | |
| D | 2023-06-21 | 2023-06-20 | AMPH | Zhou Rong | EVP, Production Center | M - OptEx | $11.33 | +9,651 | 112.3K | +9% | +$109.3K |
| DM | 2023-06-20 | 2023-06-15 | AMPH | Zhou Rong | EVP, Production Center | M - OptEx | $14.64 | +19.4K | 101.5K | +24% | +$283.7K |
| D | 2023-06-20 | 2023-06-15 | AMPH | Zhou Rong | EVP, Production Center | S - Sale+OE | $51.79 | -5,000 | 96.9K | -5% | -$258.9K |
| DM | 2023-06-20 | 2023-06-15 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $50.85 | -36.9K | 130.6K | -22% | -$1.87M |
| D | 2023-06-20 | 2023-06-15 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $19.79 | +36.9K | 142.5K | +35% | +$729.6K |
| D | 2023-06-14 | 2023-06-13 | AMPH | Zhou Rong | EVP, Production Center | S - Sale+OE | $48.24 | -5,000 | 88.3K | -5% | -$241.2K |
| D | 2023-06-14 | 2023-06-13 | AMPH | Zhou Rong | EVP, Production Center | M - OptEx | $14.40 | +5,000 | 93.3K | +6% | +$72.0K |
| 2023-06-12 | 2023-06-10 | AMPH | Lee Howard | Dir | F - Tax | $45.67 | -375 | 145.3K | -0.3% | -$17.1K | |
| D | 2023-06-07 | 2023-06-05 | AMPH | Deflin Gayle | Dir | A - Grant | $0.00 | +2,716 | 6,879 | +65% | $0 |
| D | 2023-06-07 | 2023-06-05 | AMPH | ZASLOFF MICHAEL A | Dir | A - Grant | $0.00 | +2,716 | 46.6K | +6% | $0 |
| D | 2023-06-07 | 2023-06-05 | AMPH | Gerst Diane G. | Dir | A - Grant | $0.00 | +2,716 | 15.6K | +21% | $0 |
| D | 2023-06-07 | 2023-06-05 | AMPH | Lee Howard | Dir | A - Grant | $0.00 | +2,716 | 145.7K | +2% | $0 |
| D | 2023-06-07 | 2023-06-05 | AMPH | Petersen Floyd F. | Dir | A - Grant | $0.00 | +2,716 | 82.8K | +3% | $0 |
| D | 2023-06-07 | 2023-06-05 | AMPH | PRINS RICHARD K | Dir | A - Grant | $0.00 | +2,716 | 47.1K | +6% | $0 |
| 2023-06-06 | 2023-06-04 | AMPH | Liawatidewi Yakob | EVP Corp Admin Center, Dir | F - Tax | $46.70 | -378 | 69.7K | -0.5% | -$17.7K | |
| D | 2023-06-05 | 2023-06-02 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $13.35 | +11.0K | 116.6K | +10% | +$146.8K |
| D | 2023-06-05 | 2023-06-02 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $46.35 | -11.0K | 105.6K | -9% | -$509.9K |
| D | 2023-06-05 | 2023-06-01 | AMPH | Lee Howard | Dir | M - OptEx | $16.69 | +16.7K | 159.6K | +12% | +$278.4K |
| D | 2023-06-05 | 2023-06-01 | AMPH | Lee Howard | Dir | S - Sale+OE | $45.02 | -16.7K | 142.9K | -10% | -$750.9K |
| D | 2023-05-22 | 2023-05-18 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $44.35 | -10.5K | 105.1K | -9% | -$465.7K |
| D | 2023-05-22 | 2023-05-19 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | F - Tax | $44.16 | -378 | 104.8K | -0.4% | -$16.7K |
| D | 2023-05-22 | 2023-05-18 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $13.35 | +10.5K | 115.6K | +10% | +$140.2K |
| 2023-05-19 | 2023-05-18 | AMPH | Deflin Gayle | Dir | S - Sale | $44.01 | -4,519 | 4,163 | -52% | -$198.9K | |
| D | 2023-05-19 | 2023-05-18 | AMPH | Zhou Rong | EVP, Production Center | M - OptEx | $14.40 | +10.0K | 97.6K | +11% | +$144.0K |
| D | 2023-05-19 | 2023-05-18 | AMPH | Zhou Rong | EVP, Production Center | S - Sale+OE | $44.21 | -10.0K | 87.6K | -10% | -$442.1K |
Purchase Sale Sale after option exercise All abbreviations